Remove mingw-std-threads from 3rd party deps and use native libs/headers instead

.github/workflows/build.yml

@@ -183,6 +183,12 @@ jobs:
       CCACHE_NOCOMPRESS: 1
       MAKEFLAGS: -j2
     steps:
+      - name: Enable POSIX MinGW
+        run: |
+          update-alternatives --set i686-w64-mingw32-gcc /usr/bin/i686-w64-mingw32-gcc-posix
+          update-alternatives --set i686-w64-mingw32-g++ /usr/bin/i686-w64-mingw32-g++-posix
+          update-alternatives --set x86_64-w64-mingw32-gcc /usr/bin/x86_64-w64-mingw32-gcc-posix
+          update-alternatives --set x86_64-w64-mingw32-g++ /usr/bin/x86_64-w64-mingw32-g++-posix
       - name: Configure git
         run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
       - name: Check out

.gitmodules

@@ -25,9 +25,6 @@
 [submodule "src/3rdparty/weakjack/weakjack"]
 	path = src/3rdparty/weakjack/weakjack
 	url = https://github.com/x42/weakjack.git
-[submodule "src/3rdparty/mingw-std-threads"]
-	path = src/3rdparty/mingw-std-threads
-	url = https://github.com/meganz/mingw-std-threads.git
 [submodule "doc/wiki"]
 	path = doc/wiki
 	url = https://github.com/lmms/lmms.wiki.git

include/AudioEngine.h

@@ -25,11 +25,7 @@
 #ifndef LMMS_AUDIO_ENGINE_H
 #define LMMS_AUDIO_ENGINE_H
 
-#ifdef __MINGW32__
-#include <mingw.mutex.h>
-#else
 #include <mutex>
-#endif
 
 #include <QThread>
 #include <samplerate.h>

include/ThreadPool.h

@@ -31,17 +31,10 @@
 #include <type_traits>
 #include <vector>
 
-#ifdef __MINGW32__
-#include <mingw.condition_variable.h>
-#include <mingw.future.h>
-#include <mingw.mutex.h>
-#include <mingw.thread.h>
-#else
 #include <condition_variable>
 #include <future>
 #include <mutex>
 #include <thread>
-#endif
 
 namespace lmms {
 //! A thread pool that can be used for asynchronous processing.

plugins/VstBase/RemoteVstPlugin.cpp

@@ -87,11 +87,7 @@
 #undef Unsorted
 #endif
 
-#ifdef USE_MINGW_THREADS_REPLACEMENT
-#	include <mingw.mutex.h>
-#else
-#	include <mutex>
-#endif
+#include <mutex>
 
 #include <algorithm>
 #include <vector>

plugins/VstBase/RemoteVstPlugin/CMakeLists.txt

@@ -66,21 +66,6 @@ endif()
 
 if(IS_MINGW)
 	SET(CMAKE_REQUIRED_FLAGS "-std=c++17")
-
-	CHECK_CXX_SOURCE_COMPILES("
-	#include <mutex>
-	int main(int argc, const char* argv[]) {
-		std::mutex m;
-		return 0;
-	}
-	" HAS_STD_MUTEX)
-
-	if(NOT HAS_STD_MUTEX)
-		target_include_directories(${EXE_NAME} SYSTEM PRIVATE
-			"${LMMS_SOURCE_DIR}/src/3rdparty/mingw-std-threads")
-		target_compile_definitions(${EXE_NAME} PRIVATE
-			-DUSE_MINGW_THREADS_REPLACEMENT)
-	endif()
 endif()
 
 if(LMMS_BUILD_WIN32)

plugins/ZynAddSubFx/CMakeLists.txt

@@ -111,12 +111,6 @@ set_target_properties(zynaddsubfx_nio PROPERTIES SYSTEM TRUE)
 set_target_properties(zynaddsubfx_gui PROPERTIES SYSTEM TRUE)
 set_target_properties(zynaddsubfx_synth PROPERTIES SYSTEM TRUE)
 
-if(MINGW)
-	target_link_libraries(zynaddsubfx_nio PUBLIC mingw_stdthreads)
-	target_link_libraries(zynaddsubfx_gui PUBLIC mingw_stdthreads)
-	target_link_libraries(zynaddsubfx_synth PUBLIC mingw_stdthreads)
-endif()
-
 # Relative include paths don't work automatically for the GUI, because the
 # generated C++ files aren't in the source directory. Thus, add the expected
 # source directory as an additional include directory.

plugins/ZynAddSubFx/ThreadShims.h

@@ -1,9 +1,3 @@
 #include <condition_variable>
 #include <mutex>
 #include <thread>
-
-#if defined(__MINGW32__) && !defined(_GLIBCXX_HAS_GTHREADS)
-#	include <mingw.condition_variable.h>
-#	include <mingw.mutex.h>
-#	include <mingw.thread.h>
-#endif

src/3rdparty/CMakeLists.txt

@@ -11,12 +11,6 @@ target_include_directories(jack_headers INTERFACE jack2/common)
 ADD_SUBDIRECTORY(hiir)
 ADD_SUBDIRECTORY(weakjack)
 
-if(MINGW)
-	option(MINGW_STDTHREADS_GENERATE_STDHEADERS "" ON)
-	add_subdirectory(mingw-std-threads)
-	set(LMMS_USE_MINGW_STD_THREADS ON PARENT_SCOPE)
-endif()
-
 # The lockless ring buffer library is linked as part of the core
 add_library(ringbuffer OBJECT
 	ringbuffer/src/lib/ringbuffer.cpp

src/CMakeLists.txt

@@ -154,10 +154,6 @@ if(LMMS_HAVE_OGGVORBIS)
 	list(APPEND EXTRA_LIBRARIES Vorbis::vorbisenc Vorbis::vorbisfile)
 endif()
 
-if(LMMS_USE_MINGW_STD_THREADS)
-	list(APPEND EXTRA_LIBRARIES mingw_stdthreads)
-endif()
-
 SET(LMMS_REQUIRED_LIBS ${LMMS_REQUIRED_LIBS}
 	${CMAKE_THREAD_LIBS_INIT}
 	${QT_LIBRARIES}

src/core/FileSearch.cpp

@@ -28,11 +28,7 @@
 #include <chrono>
 #include <lmmsconfig.h>
 
-#ifdef __MINGW32__
-#include <mingw.thread.h>
-#else
 #include <thread>
-#endif
 
 namespace lmms {
 FileSearch::FileSearch(const QString& filter, const QStringList& paths, const QStringList& extensions,